To find what files take space you need to inspect the VM's bundle with following command:
ls -lahR "/path/to/vm.pvm"
Yes but I just pointed out I do not know how to do that... is it in Terminal.... I have in the meanwhile discovered the path name (I think) is /users/Shared/Parallels/windows 8.1 pvm and that looking at that windows 8.1-0.hdd is 177.45 Gb
Not sure if I am doing the right thing (all this is new) but in Terminal I typed /users/Shared/Parallels/windows 8.1.pvm and got
five entries with my name (david),
Various permissions, the word staff hex sizes of 170B, 510B, 10B, 10B, 10B, dates Apr 1, Apr 2, Apr 1, Mar 19, Feb 5, and (location?) . then .. then C -> /Volumes/C E -> /Volumes/E and F -> /Volumes/F
I do not have the faintest idea what this means but if this is useful then please advise. Remember I am a newbie and a computer user, not a techie - I thought you could use Parallels without being a techie!
And thank you for your help - please excuse my nervousness!